135181205 has 8 divisors (see below), whose sum is σ = 163067904. Its totient is φ = 107578000.

The previous prime is 135181201. The next prime is 135181243. The reversal of 135181205 is 502181531.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 135181205 - 2² = 135181201 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135181201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69821 + ... + 71730.

It is an arithmetic number, because the mean of its divisors is an integer number (20383488).

Almost surely, 2^135181205 is an apocalyptic number.

It is an amenable number.

135181205 is a deficient number, since it is larger than the sum of its proper divisors (27886699).

135181205 is a wasteful number, since it uses less digits than its factorization.

135181205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141747.

The product of its (nonzero) digits is 1200, while the sum is 26.

The square root of 135181205 is about 11626.7452453384. The cubic root of 135181205 is about 513.2222044911. Note that the first 4 decimals are identical.

The spelling of 135181205 in words is "one hundred thirty-five million, one hundred eighty-one thousand, two hundred five".